Grinder.



PATENTED NOV. 27, 1906.

G. A. KIMBER.

GRINDER.

APPLICATION FILED DEO.18, 1905.

2 SHEETSSHEET 1.

W G H::

No. 836,818. PATENTED NOV. 27, 1906.

G. A. KIMBER.

. GRINDER.

2 SHEETS-SHEET 2- 2. nrgma f v e I "u 4 11! W 01 I fiwlmm l 1 4 I V V UNITED STATES PATENT OFF1OE. GEORGE ALFRED KIMBER, OF CHICAGO, ILLINOIS.

GRINDER Specification of Letters Patent.

Application filed December 18,1905. Serial Ito- 292,174.

Patented Nov. 27, 1906.

To all whom it may concern:

Be it known that I, GEORGE ALFRED KIM- certain new and useful Improvements in Grinders; and I do hereby declare that'the following is a full, clear,-and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in grinding-machines, and more particularly to a grinding-machine adapted for use in dressing abrasive wheels such as those employed in glass-cutting. Heretofore the dressing of glass-cutters Wheels has been performed entirely by hand, and in consequence, owing to slight variations of hardness of stone or inequalities of other kinds, the stone soon be-: comes untrue and is therefore worthless.

In grinding said stones it is necessary to provide a central sharp cutting edge on the stone, perfectly true and having an unvarying angular edge, for any variationintheedge of the glasscuttersc stone is certainilg to' injure the glass, even chipping it.

With this in-view the object of the invention is to provide a grinding-machine adapted to dress glass-cutters and like stones with absolute recision, thereby securing uniformity 0 edge and adapted to be operated by one not thoroughly skilled.

The invention also has for its object, the construction of a grinding-machine having maximum flexibility of adjustment of the grinder and wherein the grinding operation may be performed at any desired angle with the. plane of rotation of the disk or cutters wheel operated upon.

The invention consists in the matters hereinafter described, and more fully pointed out and defined in the appended claims.

In the drawings, Figure 1 is aside elevation of a device embodying my invention, showing. the glass-cutters' stone in position to be operated upon. Fig. 2 is a top plan view of the same. of the grinder. thereof. Fig.- 5 is an enlarged longitudinal Fig. 3 1s a rear elevation Fig. 4 isa vertical section section of one of the bearings for the arbor of the grinder.

As shown in said drawings, A indicates any suitable arbor suitably journaled to rotate the lass-cutters stone a with precision and at a igh rate of speed.

B indicates a bottom clamping member adapted to be rigidly, though adjustably, secured to the bed-plate or ways of the machine or lathe upon which the grinding operation is to be performed by means of a clamping-bolt I). Said clamp is provided at 1ts outer end with a tubular upwardly-extending cylindric boss I), which is bored to afford a cylindric vertical socket in which is secured the cylindrical end 6 of a slide-rest B which, as shown, extends horizontally and is provided in its top with dovetailed ribs 6 as shown in Figs. 1' and 3, and with which is slidably engaged a slide 'D, provided, as shown, with a dovetailed seat in its under face complemental with the width and adapted to enga e the dovetailed ribs on the slidewhich isjournaled the end of a screw-shaft d, the inner threaded end of which engages in a complementallyethreaded bore 11 in. the slide-rest B. As shown, said screw-shaft is provided at its outer end with an angular eadadapted to be engaged by a suitable crank or wrench d and whereby rotation of said shaft acts to move the slide longitudinally of the rest. Located centrally on said slide D and extending vertically upward therefrom is an integral cylindric boss (1 corres onding with the cylindric boss or studshaft Said cylindric boss fits closely in a cylindric socket ein a slide-rest E, corresponding with the slide-rest B, and likewise is provided at its top with'dovetailed ribs e, ex-

- tending longitudinally thereof and fitted into a complemental dovetailed groove or seat in a slide E, corresponding with the slide D, and

which is provided with a downturned flange e at one end thereof. Rotatably engaged therein is a screw-shaft e the threaded end of which is engaged in a/complementallythreaded socket e, as before described, and

1o grinding-arbor G. As shown,

the outer end of which, a is rectangularto be engaged by a wrench or suitable crank. The

top of said slide E is shown as fiat, and rigidly su ported and bolted thereon is a stan I 5 ard F, aving upwardly-directed arms f, the

upper ends of which, as shown, extend obliquely with and at an angle of approximately forty-five degrees with the longitudinal axis of the slide E. J ournaled in said arms is the secured axially in the upwardly-directed end of said arms, in which is rovided an oval babbitting-chamber g, and earing-sleevesg are secured in the shaft or arbor, and the ig'bearings are then babbitted, thus insurin perfect alinement. s shown,'a belt whee or pulley G fits cl y between the bearings for said arbor in said upturned arms f and is rigidly secured on said shaft by means of one 2 or more set-screws-and acts to hold the shaft 2 borby means of the nut g is the grinding or brasive wheel H. Said arbor, as shown, is shaped at its opposite end to be engaged by a wrench or other tool. Said slide-rests and the slides are heldat a definite angle with and.

0' are adjustable relative to each other by means of set-screws b and (1 which are seated the bosses -b and e, respectively, and WhlCll engage the cylindric studs or shafts b 'and d"in suitable grooves therein and not r 3 5 only hold the parts from lifting, but as well rigidly engage the same in the proper angular a ustment to dress the glass-cutters stone a at the des red angle.

The operation is as follows: The grindere o stone having been secured upon the arbor as desired and the operator having assured himself that the arbor and stone revolve'accurately, the slides are adjusted u on their rests to insure a suitable angle at t the cutting-stone H, as shown in Fig. 2. The

arbor G is of course driven from an suitable source-of power by means of a be t trained around the pulley G to rotate the abrasive wheel H op ositely from'the direction of rosio tation of t e glass-cutters wheel, and the grlndmgheel is rotated at a high rate of s eed relatively to the cutting-wheels speed. he slide D and the slide E are eachadjusted ,to the desired angle as, for instance, at approximately ariglht an le with each other,

or, in other wor eac forty-five degrees with the plane of rotation'of the wheel a and on o posite sides of the cutting-wheeland t e angular edge of the abrasive wheel H is adjusted against the wheel to be shaped,

as shown in Fig. 2, by rotation of the crank eflthuscutting away the stone-a at the angle shown in Figs. 1 and 2 or at any desired angle or to a 0rd any desired peripheral conwhich the slide said arbor ise edge'of' formation, de igndent upon theangle at plane of rotation of the wheel a. Having completed the 'cut on one side of the stone,

is adjusted relatively of the.

the grinding-wheel is retracted by means of a a crank and adjusted with the opposite cutting edge thereof at the cutting edge of the whee and by means of'the crank d? is moved inwardly, thus cutting the 'opposite'fa'ce of the stone. In this manner the sides of the stone are cut alternately, and, owing to the'precision, the speed, and'the accurate adjustment of, the abrasive stone H relatively to the cutting-wheel, said cutting wheel or stone is shaped with the utmost precision to afford the desired cutting'edge and refitted-for the work of the glass-cutter.v I It is of course immaterial that the 'glass-cutter"s stone sharpened in this manner may vary in hardness at spots in its periphery, for the reason that, owing to the mechanical precision, the stone will be accurately ground nevertheless.

While I have shown very simple forms of slide-rests'and slides and a simple form of arborsecured thereon, it is obvious that details of construction and arrangement may be varied, and Itherefore. do not pur ose limiting this application tor patent ot erwise than necessitated by the prior art.

I claim as my i-nvention- 1. The combination with two slide-rests ada ted to be arranged at equal angles relative y a common plane of a wheel rotating in said plane, a grmding-wheel carried on one of said slide-rests and movable by either or both of said slide-rests to dress the periphery of the wheel. 3 2 In a machine of the class describedthe combination with a rotative arbor of a cuttingwheel secured thereon, a slide-rest adjustably SlPPOl'tGd on the frame for said arbor-and a apted for adjustment at an angle for said wheel and a second slide-rest-su porting the same and adjustable thereto and at an angle therewith. 4

i 3. In a device of the class described the combination with two slide-rests each pivotally supported and one mounted upon the other and adapted to be adjusted at angles i one with the other, of an arbor mounted on the uppermost of said rests and at an obllque angle with the longitudinal axis thereof and a grinding-wheel carried on said arbor at one end thereof.

4. In a machine of the class described a frame, a slide-rest pivoted on the frame, a second slide-rest pivotally mounted thereon and adjustable at an angle therewith, an arbor j ournaled on said upper slide-rest at an oblique angle with its longitudinal axis and means for adjusting said rests relatively to 1 each otherand to a common plane.

5. In a device of the class described the combination with an adjustable frame, of a sliderest ivotally su ported thereon, a.

In testimony whereof I have 'hereunto slide on sai rest provi d witha cylindrio subscribed my name in the presence of two boss thereon, an upper slide-rest journaled subscribing'witnesses.

on said boss, an upper slide thereon, a frame rigidly engaged on said upper slide, an arbor journaled thereon and a grinding-wheel ca r-' ried on said arbor. r

GEORGE ALFRED KIMBER. Witnesses: j

- C; W. HILLS, .1 W1 W. WITHENBURY. 

